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Top 5 most important cars at the 2013 Frankfurt motor show

The five most important memorable cars in attendance at the world’s biggest motor show Nothing is as controversial as irritating your core enthusiasts, and the Audi Sport Quattro concept risks doing just that. Its name and styling riff off one of the most iconic cars in Audi’s back catalogue – and in WRC history – yet the new yellow version unveiled at the 2013 Frankfurt motor show has abandoned the five-cylinder engine, manual gearbox, and respectable kerbweight of the 2010 Quattro concept. In its place, we’ve an RS7-based coupe with the power of a Lamborghini Aventador (691bhp), twice the claimed economy of a Golf GTD (113mpg), but only because of a twin-turbo V8 mated to a hefty hybrid powertrain, and that means this new Sport Quattro weighs as much as a Bugatti Veyron Super Sport (1845kg).

BMW M4 Concept (2013) first official pictures

This is the new BMW M4 – don’t believe the ‘Concept’ tag. BMW’s M concepts always look identical when they reach production, and this new 424bhp coupe will be no exception. The M Division 4-series employs forced induction, signalling the death of the outgoing E92 M3’s sonorous 4.0-litre V8.

Concept Car of the Week: Ford Ghia Focus (1992)

As far back as the 1960s, Luigi Colani was preaching about organic design, and the 'biodynamic' forms that eventually became his signature. However, organic design didn't gain widespread popularity among car designers until the late 1980s and early '90s, and no car paid a greater tribute to nature and its forms than the Ghia Focus. Designed entirely by Taru Lahti only two years after graduating, the concept was a real breakthrough for the usually conservative American brand.